I created recurring subscription with 5 minutes validity time

It was activated at 1:45 (see attached screenshot of invoices)
Then I did not touch the website so that automated cron tasks would not start
Next subscriptions were created only after cron activation (see invoice hours)
For invoices this is OK because it is not so important that they are created immediately
However, the hours of successive subscriptions were also calculated from the moment of activation of the cron (see the second screenshot and the final time of subscription validity)
It looks like you are mistakenly counting the activation time of the next subscription as added to the current time and not to the end date and time of the previous subscription
For first occurrence its ok but not for next ones
This caused the subscription to have an validity time of 3:26 instead of 2:00
So it lasted 5 times longer than it should!
Assuming that we do not use automatic cron but run it on the server, however, this mechanism causes large errors in calculations, especially for micro-subscription